Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-118/ New Features Updated to Firefox 159.0 You can now import Spaces and Profiles from Arc and Dia. Boosts gets a nice upgrade! THey can now be shared with others and they get an overall quality improvement. Holding 'ctrl' (or 'cmd' on macOS) while hovering over the new tab button will now give the option to 'Pa…
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-111/ New Features Updated to Firefox 158.0.1 Boosts now have a 'focus' feature, allowing you to concentrate on a specific part of the website. Windows builds now run with CSIR PGO, improving performance and startup times. All other platforms also have performance improvements. Fixes Mozilla blocked compromised e…
Zen Stable Release Security https://www.mozilla.org/security/advisories/mfsa2026-106 New Features Updated Firefox to 158.0 Added a --space <id|name> option to the command line interface. Library will now show a 'Open in Folder' option and download speed when hovering over the toolbar icon. Zen now creates more accessible PDFs when saving a page as PDF, and when printing on Linux and macOS. This al…
Zen Stable Release New Features Added an 'open library' command to the command palette. You can now right-click the media tab in the Library to disable it. Fixes Changed session backup file names to use local dates (#15806) Fixed the library getting stuck after opening and closing it quickly (#15833) Fixed blocked/unsafe downloads not having the choice to be opened or saved. (#15809) Fixed moving…
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-104/ New Features Updated to Firefox 157.0.1 Added an option in the Library to filter closed tabs instead of history entries. A keyboard shortcut (opt/alt + shift + L) has been added to quickly open the Library. 'Clear all downloads' and 'Clear history' options have been added to the Library by right clicking on…
Zen Stable Release Introducing Library! A better place to organize and access your history, media, downloads, spaces and more. Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-97/ New Features Introducing Library! A better place to organize and access your history, media, downloads, spaces and more. You can now resize the sidebar even when its hidden. If the sidebar is resized t…
Zen Stable Release New Features Updated to Firefox 156.0.1 The command bar now allows you to search through tabs and folders more efficiently. Fixes Fixed Zen leaking system handles on Windows as content processes were started and stopped. Fixed context menu actions on the urlbar not working. (#15437) Fixed overflow-extension order in single toolbar mode. (#15419) Fixed not being able to install a…
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-90/ New Features Updated to Firefox 156.0 Zen on macOS can now be set to open automatically when the computer starts up, from the Startup section of Settings. Added the following actions to the command bar: 'Expand current view', 'New space', 'Reopen closed tab', 'Duplicate tab', 'Reset pinned tab'. Fixes Fixed…
Zen Stable Release New Features You now have the option to sync normal tabs across devices along with your Spaces, Folders, and other data. This can be enabled in Settings > Sync > Sync your Spaces across devices. You can now share Spaces, folders and split views to other Zen users and non-Zen users via a shareable link. This can be found in the context menu of a Space, folder or split view. Fixes…
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-82/ New Features Updated to Freifox 155.0 and 155.0.1 By using your Mozilla account, you can now sync your Spaces, Folders, Tabs, and much more between devices! This can be enabled in Settings > Sync > Sync your Spaces across devices. The chrome UI now has a better look and feel, implementing squircles and other…
Zen Stable Release New Features Update Firefox version to 154.0.1 Fixes Improved on session store performance, lowering CPU usage spikes and disk usage when storing the session (#14990) Fixed duplicate separator on tab context menu (#15031) Fixed minimizing PiP window failing to collapse into the sidebar (#14710) Fixed slower access to saved passwords and unexpected Primary Password prompts caused…
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-74/ New Features Update Firefox version to 154.0 Local Zen profile backups are now available on macOS in addition to Windows and Linux, and backups can be restored across all three platforms. Sites can now be exempted from having their cookies and site data cleared on shutdown without also being exempted from tr…
Zen Stable Release New Features Update Firefox version to 153.0.4 Added support for FFmpeg 63 Fixes Fixed feature callouts not using native panels (#14912) Fixed hang when using the same tab in 2 windows with different containers (#14905) Other bug fixes and improvements.
Zen Stable Release Fixes Fixed infinite media players appearing infinitely in the sidebar when a page has multiple media players. Other bug fixes and improvements.
Zen Stable Release Fixes Fixed selecting text at the top of a page making the window drag instead of selecting text. Other bug fixes and improvements.
Zen Stable Release New Features Updated Firefox to 153.0.3 You can now filter draft GitHub pull requests in live folders. Compact mode now tracks your mouse even after it leaves the window, the sidebar stays open while your cursor lingers near the window's edge and only tucks away once you move further out. This only changed for Windows and MacOS, Linux is still the same as before. You can now mov…
Zen Stable Release New Features Updated Firefox to 153.0.1 Fixes Various performance fixes, RTX Super Resolution not working, and HDR video playback not working on Windows (#14292) Fixed extra divider when urlbar has no results (#14717) Fix boost applying wrong size override (#14461) Fixed crashes/hangs when creating new spaces (#14713) Fixed non-tab drags allowing to switch Spaces (#14724) Fixed…
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-68/ New Features Updated Firefox to 153.0 High Dynamic Range (HDR) video playback is now available on Windows - this feature needs HDR mode enabled for the display in Windows Settings - Display. Improved UI for container selection and management It is now possible to merge multiple PDFs by dragging a PDF into th…
Zen Stable Release Fixes Fixed essentials promo UI leaving gap on pressing Esc (#14544) Fixed localization strings not being translated in some places (#14605) Fixed new Spaces not being able to be removed (#14618) Fixed split view drag and drop ending up opening new windows (#14619) Other bug fixes and improvements.
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-67/ New Features Updated to Firefox 152.0.6 Fixes Fixed essentials promo UI leaving gap on pressing Esc (#14544) Fixed misaligned symbolic space icons in Space options menu on Linux (#14495) Fixed Spaces switching when dragging tab to another monitor (#14511) Fixed tab order flipping when moving tabs between wor…
Zen Stable Release New Features Updated to Firefox 152.0.5 Fixes Fixed some localization strings not being translated in some places (#10749) Fixed glance being able to be open a second time when it was already open (#14460) Other bug fixes and improvements.
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-62/ New Features Updated to Firefox 152.0.4 Fixes Fixed overflowing addons not having context menus (#14382) Fixed copy, paste, undo, redo, and similar keyboard shortcuts not working inside macOS system dialogs such as the Save and Open panels. Other bug fixes and improvements.
Zen Stable Release New Features Updated to Firefox 152.0.2 and 152.0.3 Added 'Edit pinned tab' context menu item to manually set a pinned tab's URL Added 'Add Route for Domain' context menu item to quickly add a tab's domain to the Space Routing settings Fixes Prevent sidebar from flickering when moving a tab (#14131) Full-screening while on a glance tab will now expand the glance tab to a normal…
Zen Stable Release New Features Updated to Firefox 152.0.1 Fixes Fixed transparency not working after updating to 1.21.2b (#14259) Fixed frequent crashes affecting users with Intel Raptor Lake processors Fixed an issue on macOS where choosing a PDF option, such as "Save as PDF", from the system print dialog would send the job to your printer instead of saving a file. Other minor bug fixes and impr…
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-57/ New Features Updated to Firefox 152.0 Improved support for more advanced cursor movement commands, including those relating to paragraph boundaries, on macOS. On Windows and Linux, you can now copy links via the tab context menu by right-clicking a tab and selecting Share > Copy Link, making it easy to copy…
Zen Stable Release Fixes Fixed duplicate bookmarks appearing when re-opening a window in MacOS (#9540) Fixed freezes when switching spaces on certain occasions (#14110) Improved performance for switching between tabs Other minor bug fixes and improvements
Zen Stable Release New Features Updated to Firefox 151.0.4 Added 'Space Routing', a new feature that allows you to route links to a specific Space. To get started, click on the three dots in your Space name and click on 'Space Routing Settings'. Fixes Fixed extension-opened tabs not being created with the correct container (#14100) Fixed a bug with the Boosts editor having the wrong theme colors (…
Zen Stable Release Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-54/ New Features Updated to Firefox 151.0.3 Boosts now support a dark mode UI based on your system dark mode setting. Fixes Fixed auto focus for new windows not working. (#12112) Fixed desktop shortcuts showing zen as 'Nightly'. (#13745) Other minor bug fixes and performance improvements.
Zen Stable Release New Features Updated to Firefox 151.0.2 You can now type New Boost in the urlbar to quickly create a new boost for the current site! Fixes Fixed pressing u duplicating tabs. (#13851) Fixed video controls going under the screen when in fullscreen mode. (#10594) Fixed boosts not working for certain websites. (#13844) Fixed an issue on macOS where smart cards and security keys coul…
Zen Stable Release This release includes a major new feature called Boosts! Boosts allow you to customize the look and feel of any website to your liking. To start boosting, click the site's control icon in the urlbar and click the new 'Boost' button. Security https://www.mozilla.org/en-US/security/advisories/mfsa2026-46/ New Features Updated to Firefox 151.0 and 151.0.1 Boosts are now in Zen! Thi…